Estimated Timing of Revenue Recognition (Details) - License And Royalty Revenue [Member] $ in Thousands	Jun. 30, 2021 USD ($)
Remainder 2021 [Member]
Disaggregation of Revenue [Line Items]
Revenue, Remaining Performance Obligation	$ 1,096
Year 2022 [Member]
Disaggregation of Revenue [Line Items]
Revenue, Remaining Performance Obligation

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045

Name:	us-gaap_RevenueRemainingPerformanceObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant